STRUCT PWRSEQ_DEVICE(9)

🎀 struct pwrseq_device(9) — Kernel API Manual 🎀

🌸 NAME 🌸

struct pwrseq_device — private power sequencing data. That's the whole vibe, bestie: it's the private little data bundle for power sequencing.

✨ SYNOPSIS ✨

Okay so here's the actual shape of it, no cap:

struct pwrseq_device {
    struct device dev;
    int id;
    struct module *owner;
    struct rw_semaphore rw_lock;
    struct mutex state_lock;
    pwrseq_match_func match;
    struct list_head targets;
    struct list_head units;
};

🧚 Members 🧚

These are the fields, bestie — every single one is doing a job:

• dev — the device struct associated with this sequencer. It's literally the struct device for this sequencer.
• id — the device ID. Short, sweet, iconic.
• owner — prevents removal of active power sequencing providers. It's the bouncer keeping active providers from getting yeeted.
• rw_lock — protects the device from being unregistered while it's in use. Like a lil' "do not disturb" sign while someone's using it.
• state_lock — prevents multiple users from running the power sequence at the same time. One at a time, bestie, no chaotic parallel sequence energy.
• match — the power sequencer matching callback. It's the callback that does the matching, periodt.
• targets — list of targets exposed by this sequencer. A whole list of targets, exposed.
• units — list of all units supported by this sequencer. Every single unit this sequencer supports lives here.

👀 SEE ALSO 👀

Kernel file ./drivers/power/sequencing/core.c is the main character here. Also go peek at all of these, iykyk:

• struct pwrseq_unit(9)
• struct pwrseq_unit_dep(9)
• struct pwrseq_target(9)
• struct pwrseq_desc(9)
• pwrseq_device_register(9)
• pwrseq_device_unregister(9)
• devm_pwrseq_device_register(9)
• pwrseq_device_get_drvdata(9)
• pwrseq_get(9)
• pwrseq_put(9)
• devm_pwrseq_get(9)
• pwrseq_enable(9)
• pwrseq_disable(9)
• pwrseq_to_device(9)

Bye bestie 💅 — source/version: ./drivers/power/sequencing · date: October 2026 · manual: struct pwrseq_device(9). Go sequence those powers safely 🫶✨